It's often said that revenge is a dish best served cold -- but as Taylor Swift is finding out, it's also pretty good if you can serve it in front of thousands of screaming fans.

StubHub (via Radar Online) reports that Swift, who happens to be on the road at the same time as a handful of her ex-boyfriends, is basically whomping them all at the box office. In fact, in most cases, the numbers aren't even close; for instance, Taylor's Red Tour, which started its most recent leg in March, is outselling the Jonas Brothers' latest tour (which includes her former beau Joe Jonas) by a 19-1 margin.

That's a lot of tickets -- but it's a slim difference compared to another of Swift's exes, John Mayer, who's being outsold by a whopping 57-1 margin even after ramping up demand by postponing his shows for a year.

Swift's former love Harry Styles is also touring, with his bandmates in One Direction, and although Radar admits 1D's current tour is outselling Swift's by a roughly 30 percent margin, they employ a bit of (admittedly rather scurrilous) math to point out that since Styles needs to split those profits five ways, he's taking quite a bit less to the bank than his former paramour.

No matter how you look at it, Taylor Swift is selling a ton of concert tickets. How many have you bought?